PART - 1 CH - 5Work, Energy and Power — Physics STD 11 Science — Question

Consider the following statement regarding a thermocouple:

1. The neutral temperature does not depend on the temperature of the cold junction.
2. The inversion temperature does not depend on the temperature of the cold juhction.

1. Both A and B are correct.
2. A is correct but a is wrong.
3. B is correct but A is wrong.
4. Both A and B are 1trong.

Why is the dome of water reservoir thick at the bottom?

Which waves will be formed in a resonance tube?

Rocket motion is subjected to which law of Newton's motion?

Why birds are often seen to swell their feathers in winter?

Read each statement below carefully and state, with reasons, if it is true or false:
The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre.

Consider the situation of the previous problem. If the mirror reflects only 64% of the light energy falling on it, what will be the ratio of the maximum to the minimum intensity in the interference pattern observed on the screen?

Which of the following symptoms is likely to afflict an astronaut in space (a) swollen feet, (b) swollen face, (c) headache, (d) orientational problem.

A tank with a square base of area 1.0m² is divided by a vertical partition in the middle. The bottom of the partition has a small-hinged door of area 20cm². The tank is filled with water in one compartment, and an acid (of relative density 1.7) in the other, both to a height of 4.0m. compute the force necessary to keep the door close.